Help me out here.......I have a completely "gutted" set of corsa tips that came on my Baja. They still have the external flappers. Do I need to install internal flappers as well? I am worried about water inversion but really don't want to fool with internal flappers if not necessary...All opinions are welcome.

You definitely need to worry about reversion as you don't want to lock your motor and start compressing water....bad things happen at that point! I'm not sure what the rule is when looking at the waterline versus the exhaust and the riser height. My exhaust is under the water when I'm off plane and I don't have a very high riser so I have external flappers AND internals and I still worry!!!

Do a search in the forums for REVERSION and see what comes up. I'm sure others have opinions/advice!!!!

Be careful of all of our advice....sometimes you get what you pay for!

Dave,
Thanks for your reply...seems you are the only one out of 68 viewers that have an opinion....maybe the only one who even knows what "Flappers" are. I will go with your opinion...inside flappers it is. I get the feeling if it isn't a 1000hp race boat people just don't care..

srpbaer, sorry you feel that way about the amount of views compared to posts. I have no idea on your flapper problem, so I didn't post any info. My exhaust is thru hull and about 6" off the water, don't think I'll have a reversion problem

I got inside and outside flappers might be overkill but I have seen bent rods and broken pistons caused by water. Rag's

srpbaer,
Yeah...sometimes people don't post much but spend lots of time "viewing". When I have the opportunity (and the knowledge which is usually limited) I will post a reply. I have been thinking about reversion lately as well and my transom looks similar to ragtops so I make sure I take extra precaution. There are a few of us on the board that don't have 38+ foot boats and we don't run 1000hp either. There is a huge knowledge base on the board, just be patient and you'll get the information you are looking for!!!

I have just the outside flappers and I have a big cam and headers with 0 problems.

Lets get something straight here. Those flappers whether salisbury internal type or rubber externals will not help to eliminate reversion. They may actually contribute to it. Their sole purpose is to help prevent water from backwashing into the engine from either a following sea or waves.
I only have the external rubber flappers on mine. I have Teague switchable tips, but I kept on blowing out the internal salisbury flappers. The last time they blew out, I refused to replace them again. I hope nobody was behind me the times they blew out of my pipes!!

I replaced my mufflered Corsa cans with Corsa gutted with the internal, and we have external Salsbury's. I just want the added protection.
And yes, with the hatch up you here the internals clack a bit, but normal running you do not know their there.
The Corsa warranty is good too.
Bryan

Another view.